Liquid cooling management
11.3 Liquid cooling management
There are 2 structures for handling the cooling management for inverter and motor: ud53
liquid cooling control and ud55 motor cooling control.
Except for the selection and type of the actual value setting, both controls are absolutely
identical.
The output signal of the control can alternatively be assigned to a digital output or an ana-
log output.
Behaviour in case of sensor error or missing mains supply
➢ In error case (sensor short-circuit or sensor breakage, and in
case of a missing power unit ready signal (missing mains volt-
age), the real temperature cannot be measured.
Due to the risk of condensation, cooling is deactivated in these
cases.
PI controller
11.3.1.1 Heat sink cooling
Figure 140: Overview controller
With this type of control, either a fixed setpoint or the distance of the heat sink tempera-
tures from the corresponding OH threshold is preset.
Activation of the controller
The selected temperatures are used as actual values for the PI controller.
Setting depends on inverter hardware.
Currently, the setting must always be 2: HS_1
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